Anatomy of Sodium Hypochlorite Accidents by Omid Mehdipour‚ DDS Donald J. Kleier‚ DMD Robert E. Averbach‚ DDS Omid Mehdipour‚ DDS International Student Program Donald J. Kleier‚ DMD Professor and Chairman Robert E. Averbach‚ DDS Professor of Endodontics Division of Endodontics University of Colorado School of Dental Medicine Aurora‚ Colorado Abstract Sodium hypochlorite (NaOCl) in various concentrations is the most widely used endodontic irrigant‚ but it can be an irritant to vital tissues
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I:ABSTRACT The researcher conduct this study due to economics crisis nowadays. It ’s aim to create a product of chalkwhich is cheaper and could give the same quality which the commercial one could give through eggshells. This steps was made by the researcher to make a chalk out of eggshells;First she clean the empty eggshell of the chicken through washing‚then when the eggshells is already dry‚ she pound the clean eggshells very well until it will become a powder‚then she get the residue and she
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demonstrates the similarity between the value of the sum for Reaction 1 and Reaction 2’s change in temperature‚ compared to Reaction 3’s change in temperature. Reaction 1 was the dissolution of solid sodium hydroxide in water with a ΔH°rxn of -47047 J/mol‚ Reaction 2 was the neutralization of liquid sodium hydroxide with HCl with a ΔH°rxn of -31289 J/mol and Reaction 3 was the dissolution and neutralization of solid NaOH with HCl with a ΔH°rxn of -91000 J/mol. Consequently‚ the sum of Reaction 1 and
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Solution Name Color Description Known 1 Barium Green Known 2 Calcium Red Known 3 Sodium Yellow Known 4 Rubidium Purple Known 5 Potassium Blue Known 6 Lithium Pink Unknown Sodium Yellow Unknown Potassium Blue The first unknown is sodium because it has a yellow flame. The second unknown is potassium because it has a blue flame. Part 2: Hydrogen Helium Sodium Neon Mercury Star 1 Purple‚ 410 Blue‚ 449 Yellow‚ 579 Purple‚ 420 Blue‚ 430 Aqua
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“Star Apple (Chrysophyllum cainito) as an Antiseptic Mouthwash” An Investigatory Project Presented to the Science Unit of the Basic Education Department; S.Y. 2014-2015 8 Names of the Researchers: Bello‚ Maria Isabella Bonalos‚ Kristine Mae Delaminez‚ Alpre Layague‚ Francheska Lian Nunez‚ Adrian Joshua Submitted to: Mr. Jann Andre Padua Chapter I The Problem and Its Background Introduction a. Background of the Study As an effective mouthwash is one that does not
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Republic of the Philippines DEPARTMENT OF EDUCATION REGIONAL SCIENCE HIGH SCHOOL FOR REGION I Division of La Union Bangar‚ La union Effectiveness of Snail shell (Nassariusmutabilis) asAdditive in Chalk Making Proponents: FERNAN MACUSI GERALD JAVAR (IV- Europium) ROGELIO C. VALDEZ (Research Adviser) Abstract Table of Contents Title……………………………………………………………………………………….…i Abstract…………………………………………………………………………………......ii
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Hugh Kim Lab Report: Stoichiometry Lab 1. Prelab Part1. 1) Create no waste = The principle that encourages chemists to not create waste at the first place rather than cleaning it up afterwards effectively shifts the chemistry more environmentally conscious‚ as creating no waste would make the experiment efficient; the reactants will be reduced to only the essential ones and the product will be maximized‚ a change that would make the experiment economic. Also‚ if chemists aim to
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THE MOLE CONCEPT References : Mohammed and Lambert ( Old Edition) Chapter 11 pg. 107 Mohammed and Lambert ( New edition) Chapter 8 pg 123 Anne Tindale Chapter 10 pg 46 The following topics will be covered : 1. Definition of Relative Atomic and Relative Molecular Masses. 2. Calculation of Relative Molecular Masses 3. Converting Moles to Grams / Grams to Moles 4. Calculation from equations Masses of substances /Volumes of gases / Concentration
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OXIDATION AND REDUCTION Oxygen makes up only about 20% of the air‚ yet is the essential component for so many reactions. Without it fuels would not burn‚ iron would not rust and we would be unable to obtain energy from our food molecules through respiration. Indeed animal life on the planet did not evolve until a certain concentration of oxygen had built up in the atmosphere over 600 million years ago. The term oxidation has been in use for a long time to describe these and other reactions where
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From the experiment‚ it was determined that Sodium chloride had a crystalline structure‚ even after being broken into smaller pieces with a hammer. Even though there was two different types of Sodium chloride‚ coarse and fine‚ they still had a symmetrical‚ three-dimensional shape. All ionic compounds have this structure. It was also found that Sodium chloride had a high melting point and sugar had a low melting point. This is because Sodium chloride is ionic and the bonds holding it together take
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